Resource allocation method and apparatus for relay node under the condition of carrier aggregation

ABSTRACT

A resource allocation method and apparatus for a relay node under the condition of carrier aggregation are disclosed in the embodiments of the present invention. By applying the technical solution of the embodiments of the present invention, a relay node can determine information of cells, which are currently available for allocation, of a Un interface, and report the information to an eNB, so that the eNB can allocate corresponding Un interface resources for the relay node according to the information. Thus the eNB side can accurately obtain the information of the cell resources, which are available for allocation and currently correspond to the relay node, of the Un interface. Thus the problem is solved that the relay node cannot properly work under the condition of the carrier aggregation caused by the mismatching between the Un interface resources directly allocated by the eNB and the relay node in the prior art.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of PCT/CN2011/080772 filed on Oct.14, 2011, which claims priority to Chinese Patent Application No.201010515839.0 entitled “Resource Allocation Method and Apparatus forRelay Node under the Condition of Carrier Aggregation” filed in thePatent Office of the People's Republic of China on Oct. 15, 2010, thedisclosures of which are incorporated by reference in their entireties.

FIELD OF THE INVENTION

The present invention relates to the field of communication technology,in particular to the resource allocation method and apparatus for relaynode under the condition of carrier aggregation.

BACKGROUND OF THE PRESENT INVENTION

In LTE (Long term Evolution) and previous wireless communication system,a cell only has a (or a pair of) carrier generally, and a UE (UserEquipment) can only receive and send data in a cell (on carrier) at thesame time.

FIG. 1 shows the schematic diagram of carrier bandwidth in current LTEsystem. In LTE system, the maximum bandwidth of carrier is 20 MHz.

With the development of communication technology, LTE-A (Long TermEvolution Advanced) system has witnessed great improvement of peak ratecompared with LTE, and is required to reach 1 Gbps downlink and 500 Mbpsuplink. Obviously, the transmission bandwidth of 20 MHz has been unableto meet such demand. Besides higher requirements on transmission rate,LTE-A system needs better compatibility with LTE system. Inconsideration of the improved peak rate, compatibility with LTE systemand full use of spectrum resource, CA (Carrier Aggregation) technique isintroduced in LTE-A system, viz. the UE can aggregate a plurality ofcomponent carriers at the same time and transmit data on the carrier atthe same time so as to improve data transmission rate.

To ensure that the UE of LTE system can work under each carrieraggregated, each carrier is set no more than 20 MHz. Each componentcarrier in LTE-A system is compatible with LTE Rel-8.

FIG. 2 shows the schematic diagram of CA technique in current LTE-Asystem.

In LTE-A system shown in FIG. 2, the UE can aggregate 4 carriers. Datacan be transmitted to the UE on 4 carriers at network side at the sametime.

Furthermore, FIG. 3 shows the schematic diagram for network structure ofcurrent system with RN (Relay Node) introduced; wherein, an eNB (evolvedNodeB) is connected to a core network (CN) through a wire interface, theRN is connected to a DeNB (Donor eNB) through a wireless interface, aR-UE is connected to the RN through the wireless interface (Uuinterface).

In prior art, the RN can be divided into the following types accordingto type of a relay data package:

L1 RN (Layer 1 Relay Node);

L2 RN (Layer 2 Relay Node);

L3 RN (Layer 3 Relay Node).

Wherein, the L3 RN can be divided into the following two kinds accordingto that whether it is necessary to divide carrier resource on timedomain:

The RN requiring resource division;

The RN not requiring resource division;

It should be noted that the RN Type mentioned in follow-up descriptionof embodiment of the present invention is namely the RN requiring or notrequiring resource division.

The RN requiring resource division cannot receive and send at Uuinterface and Un interface at the same time, or self-interference willbe caused. To avoid self-interference, a solution is to create ‘gaps’ ina downlink access transmission time of an R-UE of the Uu interface. Thegap can be used for a DL BH Link (Downlink Backhaul Link), viz. downlinkBH subframe. ‘Gaps’ configuration can be realized through a MBSFN(Multicast Broadcast Single Frequency Network) subframe.

FIG. 4 shows the schematic diagram for relay link downlink transmissionat Un interface by using MBSFN subframe in prior art. In these ‘gaps’,downlink transmission will be performed between the DeNB and the RNrather than between the RN and the R-UE.

Furthermore, RN starting process of the current network with RNintroduced is divided into the following two phase:

Phase I: the RN is accessed to the network as a UE. The specific processflow is:

The RN is attached to network in the same manner as UE. The RN downloadsinitial configuration information from RN OAM, including a Donor Celllist allowable for connection, and then is deattached.

Phase II: accessed to network as the RN. The specific process flow is:

First, the RN selects the Donor cell: select a Donor cell from the Donorcell list provided in Phase I.

Then select a MME for the RN: the RN informs the DeNB the identity ofthe RN through a RRC signaling during attachment. The DeNB selects a MMEsupporting the RN for the RN based on the information;

Select a GW for the RN: the MME selects the DeNB as a P/S-GW of the RNafter a CN informs the MME that the access node is RN;

Corresponding S1 and X2 interfaces are recommended between the RN andthe DeNB: the RN launches the process of establishing S1 and X2 on abear built by the DeNB.

In the prior technical solution, L3 RN type is determined with themethods as below:

If the application of CA for the Un interface is not taken into accountin R10 edition of 3GPP LTE-A specification, RN type is determined by RNrealization in a possible manner as below:

The RN acquires the cell supported by a RN Uu interface from a RN OAM;

The RN determines the cell used by the Un interface according to thedonor cell accessed;

The RN determines the RN type according to the cell supported by the Uuand Un interface and software and hardware capacity of the RN (whetherresource division is required);

The RN indicates type of the RN to the DeNB through a 1 bit indication.

In the prior technical solution, RN type can be indicated in two mannersas below. The specific manner has not been decided.

Alt1: carried in a RRC connection complete message;

Alt2: define independent RN type indication message;

During implementation of the embodiments of the present invention, theapplicant finds that the following problems at least exist in theavailable technology:

If the CA is not taken into account and both Uu interface and Uninterface only support a cell, CC/cell allocation of Un and Uu interfacewill not exist. The DeNB can work normally after determining whether itis necessary to configure the BH subframe according to the RN type afteracquiring the RN type.

If the CA is considered, the problem will be complex. The cell that canbe accessed to some RNs in Un interface may be not accessed owing tolimit of the RN type. For example:

The RN accesses a DeNB1 for a RACH on cell a in Phase II for startingthe RN.

According to the cell list downloaded from the RN OAM in Phase I, thecell that can be used by the RN under the DeNB1 is cell a and cell b;meanwhile, the cell list of the Uu interface downloaded by the RN fromthe RN OAM comprises cell a, cell b and cell c. Thus, if the RN typereported by the RN to the DeNB is “Not requiring resource division”, theDeNB cannot work normally. The main reasons are as follows:

(1) The DeNB does not know whether the RN supports other cells besidescell a, so the DeNB cannot realize CA operation for the RN;

(2) The DeNB does not know which cells may be used by the RN Uuinterface and whether resource division is required when these cells arecombined with the cell of Un interface;

In conclusion, to ensure that the system combining the CA and the RN canwork normally, it is necessary to solve the problem; however, suchtechnical solution has not been provided in prior art.

SUMMARY OF THE INVENTION

The embodiments of the present invention provide a resource allocationmethod and apparatus for relay node under the condition of carrieraggregation. Resource of configurable cell of Un interface is reportedto an eNB through a RRC signalling, which solves the problem that the CAand RN combining system cannot work normally according to the priormechanism.

To achieve the purpose, the embodiments of the present invention providea resource allocation method for relay node under the condition ofcarrier aggregation on one hand, comprising:

Relay node acquires information of available cell of Un interface;

The relay node determines its relay node type according to informationof available cell of the Un interface;

The relay node determines information of the current cell available forallocation of Un interface according to the information of availablecell of Un interface and relay node type;

The relay node sends the determined information of the current cellavailable for allocation of Un interface to an eNB that the relay nodeis affiliated to, in order to make the eNB can allocate Un interfaceresource for the relay node according to information of the current cellavailable for allocation of Un interface.

On the other hand, the embodiments of the present invention provide arelay node, which comprises:

Acquisition module, is used for acquiring information of available cellof Un interface;

Type determination module, is used for determining relay node typeaccording to the information of the available cell of Un interfaceacquired by the acquisition module;

Information determination module, is used for determining information ofthe cell available for allocation of Un interface of the relay nodeaccording to the information of the available cell of Un interfaceacquired by the acquisition module and relay node type determined by thetype determination module;

Sending module, is used for sending the information of the current cellavailable for allocation of the Un interface determined by theinformation determination module to the eNB that the relay node isaffilicated to in order to make the eNB can allocate Un interfaceresource for the relay node according to information of the current cellavailable for allocation of Un interface.

On the other hand, the embodiments of the present invention provide aresource allocation method for relay node under the condition of carrieraggregation, which comprises:

The eNB receives information of the current cell available forallocation of the Un interface sent by the relay node;

The eNB allocates resource of Un interface for the relay node accordingto the information of the current cell available for allocation of theUn interface.

Besides, the embodiments of the present invention also provide an eNB,including:

Receiving module, is used for receiving information of the current cellavailable for allocation of Un interface sent by the relay node;

Allocation module, is used for allocating resource of Un interface forthe delay node according to information of the current cell availablefor allocation of the Un interface received by the receiving module.

Compared with available art, the embodiments of the present inventionhave the following advantages:

Upon application of the technical solution for embodiments of thepresent invention, the relay node can determine information of thecurrent cell available for allocation of the Un interface and report theinformation to the eNB so that the eNB can allocate corresponding Uninterface resource for the relay node and further the eNB can accuratelyacquire resource information of the current cell available forallocation of the Un interface corresponding to the relay node, whichsolves the problem that the relay node cannot work normally undercondition of carrier aggregation caused by mismatching between the Uninterface resource directly allocated by the eNB and the relay node inprior art.

BRIEF DESCRIPTION OF THE DRAWINGS

To further explain the technical solution of the embodiments of thepresent invention or available technology, the drawings required fordescription of the embodiments of the present invention or of availabletechnology will be briefly introduced below. Obviously, the followingdescribed drawings only refer to some embodiments of the presentinvention. Technical personnel of the field can obtain other drawingsaccording to these drawings without contributing creative work.

FIG. 1 is a schematic diagram for carrier allocation of LTE cell inprior art;

FIG. 2 is a schematic diagram for CA technology in prior art;

FIG. 3 is a structural diagram for LTE-A network in prior art;

FIG. 4 is a schematic diagram for relay link downlink transmission of Uninterface by utilizing MBSFN subframe in prior art;

FIG. 5 is a flow diagram for resource allocation method of relay nodeunder the condition of carrier aggregation put forward in embodiments ofthe present invention;

FIG. 6 is a flow diagram for resource allocation method of relay nodeunder specific application scene at eNB side put forward by embodimentsof the present invention;

FIG. 7 is a structural diagram for relay node put forward by embodimentsof the present invention;

FIG. 8 is a structural diagram for eNB put forward by embodiments of thepresent invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Then we will combine the attached drawings in the present invention toclearly and fully describe the technical proposals therein below.Obviously, the embodiments described are only a part of the embodimentsof the present invention instead of the whole. Based on the embodimentsof the present invention, all other embodiments acquired by ordinarytechnicians of this field on the premise of paying no creative work arewithin the protection of the present invention.

As described in background technology, the RN is introduced into theLTE-A to improve the system throughput and increase network coverage andthe CA is brought in for the purpose of improving peak rate. Theembodiments of the present invention offer a method for determiningcarrier/cell source of Uu interface and Un interface in the system withcombined CA and RN.

FIG. 5 shows a flow diagram for resource allocation method for relaynode under the condition of carrier aggregation put forward inembodiments of the present invention, which specifically comprises thefollowing steps:

Step S501, the relay node acquires information of available cell of theUn interface.

In practical application, the step is realized through the followingprocesses:

The relay node determines which cells belonging to the eNB that therelay node is affiliated to according to the cell list informationdownloaded from OAM of the relay node. When a cell and the cell that therelay node is accessed to are affiliated to the same eNB, the relay nodedetermines the cell as the available cell of its Un interface.

Furthermore, realization of the step comprises the processing of theinformation that the relay node acquires from the available cell of theUu interface. The specific processing is as below:

The relay node acquires information of the available cell of its Uuinterface according to the cell list information of Uu interfacedownloaded from the OAM of the relay node.

Step S502, the relay node determines its relay node type according tothe information of the available cell of the Un interface.

Based on description in step S501, when information of the availablecell of the Uu interface is acquired in step S501, the specificprocessing in this step is as below:

The relay node determines its relay node type according to theinformation of the available cell of the Un interface, the informationof the available cell of the Uu interface and its own software/hardwarecapacity information.

According the conditions, the relay node determined in this step can bedivided into the following types in specific application scene:

Case I: when the software/hardware capacity information of the relaynode only supports resource division, the relay node determines itsrelay node type as “Requiring resource division”.

Case II: when the software/hardware capacity information of the relaynode only supports not requiring resource division, the relay nodedetermines its relay node type as “Not requiring resource division”.

Case III: when the software/hardware capacity information of the relaynode supports the both, the relay node type can be further divided intothe following three conditions according to information of the availablecell of the Un interface and information of the available cell of the Uuinterface:

(1) When both the cells corresponding to information of the availablecell of the Un interface and information of the available cell of the Uuinterface cannot meet the requirement of not requiring resourcedivision, the relay node determines its relay node type as “Requiringresource division”.

(2) When a part of the cells corresponding to information of theavailable cell of the Un interface and information of the available cellof the Uu interface meet the requirement of not requiring resourcedivision, the relay node determines its relay node type as “Requiringresource division” or “Not requiring resource division” based on itsdemand.

(3) When both the cells corresponding to information of the availablecell of the Un interface and information of the available cell of the Uuinterface meet the requirement of not requiring resource division, therelay node determines its relay node type as “Not requiring resourcedivision”.

Step S503, the relay node determines information of the current cellavailable for allocation of the Un interface according to information ofthe available cell of the Un interface and the relay node type.

It should be noted that after determining the relay node type in stepS502, the relay node can also determine information of the current cellavailable for allocation of its Uu interface according to the relay nodetype to avoid the existence of resource that cannot be allocated ininformation of the available cell of the Uu interface acquired in stepS501. Information of the current cell available for allocation of the Uuinterface is determined mainly based on the relay node type.

In addition, it should be noted that the sequence for determininginformation of the current cell available for allocation of the Uuinterface and information of the current cell available for allocationof the Un interface can be adjusted mutually and the preferentialdetermination of information will not affect the protection scope of thepresent invention.

In step S504, the relay node sends the determined information of thecurrent cell available for allocation of the Un interface to the eNBthat the relay node is affiliated to, in order to make the eNB canallocate Un interface resource for the relay node according to theinformation of the current cell available for allocation of the Uninterface.

In practical application, the specific processing in this step is asbelow:

The relay node reports the information of the current cell available forallocation of the Un interface to the eNB that the relay node isaffiliated to through RRC message;

The eNB allocates Un interface resource for the relay node according toinformation of the current cell available for allocation of the Uninterface and the current transmission demand.

It should be noted that in practical application, when the relay nodereports the information of the current cell available for allocation ofthe Un interface to the eNB that the relay node is affiliated to throughRRC message, the RRC message can also carry the relay node relay nodetype.

Certainly, the relay node type can be sent to the eNB through othermessages.

The description shows the realization flow of technical solution putforward in embodiments of the present invention at the relay node side.Correspondingly, the eNB allocates Un interface resource directlyaccording to information reported by the relay node at eNB side. It willnot be repeated hereby.

Compared with available technology, the embodiments of the presentinvention have the following advantages:

Upon application of the technical solution for embodiments of thepresent invention, the relay node can determine information of thecurrent cell available for allocation of the Un interface and report theinformation to the eNB so that the eNB can allocate corresponding Uninterface resource for the relay node, and the eNB can accuratelyacquire resource information of the current cell available forallocation of the Un interface corresponding to the relay node, whichsolves the problem that the relay node cannot work normally undercondition of carrier aggregation caused by mismatching between the Uninterface resource directly allocated by the eNB and the relay node inprior art.

The technical solution put forward by the embodiments of the presentinvention will be explained in combination with actual implementationsite.

The embodiments of the present invention put forward a method fordetermining resource allocation of configurable carrier/cell of Uuinterface and Un interface by RN in the system combining CA and RN, viz.the RN determines resource of configurable cell of RN Uu/Un interfaceaccording to RN type and then reports resource of configurable cell ofthe Un interface to DeNB through RRC signalling.

To facilitate the follow-up description, meanings of the terms below infollow-up embodiments of the present invention are explained hereby:

Available cell of Un interface: the cell downloaded by RN in Phase I forstarting the RN and affiliated to the same DeNB as the cell which RNchose to access in Phase II in the cell list.

Configurable cell of Un interface: the cell that the RN can work at Uninterface under the current RN type determined. It is specifically theavailable cell list or cell sublist of Un interface.

Available cell of Uu interface: the cell downloaded by the RN from RNOAM and can be used by RN Uu interface;

Configurable cell of Uu interface: the cell that the RN can work in Uuinterface under the current RN type determined. It is specifically theavailable cell assembly or cell sub-assembly of Uu interface.

The technical solution put forward by the embodiments of the presentinvention can be specifically explained into the following aspects:

1) Determination of Cell Available for RN Un Interface

The RN can determine the relation between cell and DeNB according to theformer 20 bits of cell ID in cell list information downloaded from RNOAM. If the cell is affiliated to the same DeNB with the cell that thecurrent RN is accessed to, the cell can be determined as the cellavailable for RN Un interface.

In the process, the RN can also determine the cell available for RN Uuinterface, viz. all cells in cell list of Uu interface configured by RNOAM.

2) Determination of RN Type. RN Type is Determined by RN Realization.

RN type is mainly determined based on: the cell available respectivelyfor RN Un interface and RN Uu interface as well as software/hardwarecapacity of the RN.

RN type is determined in, but not limited to the following manners:

A. If RN software/hardware capacity only supports resource division, RNtype can be determined as “Requiring resource division”;

B. If RN software/hardware capacity only supports not requiring resourcedivision, RN type can be determined as “Not requiring resourcedivision”;

C. If RN software/hardware capacity supports the both, then:

a. If the both cells supported by Uu interface and Un interface cannotmeet the requirements of not requiring resource division, RN type canonly be selected as “Requiring resource division”;

b. If a part of cell among cells supported by Uu interface and Uninterface meet the requirements of not requiring resource division, RNtype can be selected as “Requiring resource division” or “Not requiringresource division”. It is selected specifically depending on RNrealization;

c. If the both cells supported by Uu interface and Un interface meet therequirements of not requiring resource division, the RN type can beselected as “Not requiring resource division”.

3) Determination of Configurable Cell of the RN Un/Uu Interface

The determination depends on RN realization. The configurable cell ofthe RN Uu/Un interface is determined based on the available cell of theRN type and the RN Uu/Un interface.

For example, if the RN type is selected as “Requiring resourcedivision”, the available cell of the Uu interface with the isolation tothe RN Un interface not meeting the requirements cannot be configured asthe available cell of the RN Uu interface.

Wherein, the configurable cell of the Uu interface is determined mainlybased on the RN type.

4) The RN Reports the Configurable Cell of the Un Interface to the DeNB

The RN reports the configurable cell of the Un interface to the RNthrough the RRC signalling, and the DeNB configures the cell working atthe Un interface for the RN according to the cell reported by the RN andtraffic transmission demand.

In addition, the RN can also carry RN type when reporting theconfigurable cell of the Un interface to the DeNB. RN is allowed toreport the configurable cell of the Un interface and report the RN typewith the same or different RRC signalling.

It should be noted that it is allowed for the RN to modify theconfigurable carrier resource of the RN type and the Uu/Un in follow-upprocess if necessary (such as UL congestion of Un interface andsufficient resource of Uu interface). The change will not affect theprotection scope of the present invention.

In specific application scene, embodiments of the present inventionfurther put forward the following embodiments, as shown in FIG. 6, whichcomprises the following steps:

Step S601, the RN acquires RN OAM configuration information.

In Phase I of starting RN, the RN is attached to network in the samemanner of a UE. To be specific, the RN downloads initial configurationinformation from OAM of the RN and then is deattached. Wherein, the RNOAM information at least comprises the cell assembly that can beaggregated at Uu interface between the RN and R-UE, and the donor celllist allowed to be assessed by the RN;

Step S602, the RN determines the donor cell to be assessed.

The RN selects a cell from the donor cell list configured for the RN OAMat random or according to certain rules as the donor cell.

Step S603, the RN determines the available cell assembly Gun_pre of theUn interface.

The RN determines first which DeNB the donor cell selected in Step S602is affiliated to and then selects all cells afflicted to the same DeNBfrom the donor cell list configured for RN O&M. The cells arealternative assembly Gun_pre of the available cell of the Un interface.

Step S604, the RN determines the available cell assembly Guu_pre of theUu interface. The cell assembly aggregated at Uu interface configuredfor the RN Q&M is directly used as the available cell assembly Guu_preof the RN on the Un interface.

Step S605, the RN determines its relay node type.

The RN determines the RN type according to the available cell assemblyGuu_pre of the Uu interface, the available cell alternative assemblyGun_pre of Un and the software/hardware capacity of the RN determined inthe aforesaid steps in the principles as below:

(1) If RN software/hardware capacity only supports resource division, RNtype can be determined as “Requiring resource division”;

(2) If RN software/hardware capacity only supports not requiringresource division”, the RN type can be determined as “Not requiringresource division”;

(3) If RN software/hardware capacity supports the both, then:

If the both cells contained in the Guu_pre and the Gun_pre cannot meetthe requirements of not requiring resource division, the RN type canonly be selected as “Requiring resource division”;

If partial cells contained in the Guu_pre and the Gun_pre can meet therequirements of not requiring resource division, the RN type can beselected as “Requiring resource division” or “Not requiring resourcedivision”. It is selected specifically depending on RN realization;

If the both cells contained in the Guu_pre and the Gun_pre meet therequirements of not requiring resource division, the RN type can beselected as “Not requiring resource division”.

Step S606, the RN determines the configurable cell assembly Guu of theRN Uu interface.

The RN determines the configurable cell assembly Guu according to the RNtype and the Guu_pre and the Gun_pre of the Uu interface. The RN willdetermine depending on RN realization; the RN can determine all or apart of Guu_pre as the Guu.

Step S607, the RN determines the configurable cell assembly Gun of theRN Un interface.

The RN determines the Gun through certain realization manner. Forexample, the RN can determine the Gun in the manners as below:

If the RN type is selected as “Not requiring resource division”, the RNselects the cell meeting the requirements of not requiring resourcedivision together with all the cells in the Guu from the Gun_pre as theGun.

If the RN type is selected as “Requiring resource division”, the RNselects the cell that does not meet the requirements on isolationtogether with any cell in the Guu from the Gun_pre as the Gun.

Step S608, the RN informs the RN type and Gun to the DeNB through theRRC signaling.

Gun is namely the configurable cell assembly between the DeNB and theRN.

Step S609, the DeNB allocates Un interface resource for the RN accordingto the Gun.

Compared with available technology, the embodiments of the presentinvention have the following advantages:

Upon application of the technical solution for embodiments of thepresent invention, the relay node can determine information of thecurrent cell available for allocation of the Un interface and report theinformation to the eNB, so that the eNB can allocate corresponding Uninterface resource for the relay node, and the eNB can accuratelyacquire resource information of the current cell available forallocation of the Un interface corresponding to the relay node, whichsolves the problem that the relay node cannot work normally undercondition of carrier aggregation caused by mismatching between the Uninterface resource directly allocated by the eNB and the relay node inprior art.

To realize the technical solution for embodiments of the presentinvention, embodiments of the present invention also put forward a relaynode. The structural diagram is shown in FIG. 7, which comprises:

Acquisition module 71, is used for acquiring information of availablecell of Un interface;

Type determination module 72, is used for determining the relay nodetype according to the information of the available cell of the Uninterface acquired by the acquisition module 71;

Information determination module 73, is used for determining informationof the current cell available for allocation of the Un interface of therelay node according to the information of the available cell of the Uninterface acquired by the acquisition module 71 and the relay node typedetermined by the type determination module 72;

Sending module 74, is used for sending the information of the currentcell available for allocation of the Un interface determined by theinformation determination module 73 to the eNB that the relay node isaffiliated to, in order to make the eNB allocates Un interface resourcefor the relay node according to information of the current cellavailable for allocation of the Un interface.

In specific application scene, the acquisition module 71 is specificallyused to:

Determine which cells belonging to the eNB that the relay node isaffiliated to, according to the cell list information downloaded fromOAM of the relay node;

When a cell and the cell that the relay node is accessed to areaffiliated to the same eNB, the cell is determined as the available cellof its Un interface.

On the other hand, the acquisition module 71 is also used to acquireinformation of the available cell of the Uu interface of the relay nodeaccording to the cell list information of the Uu interface downloadedfrom the OAM of the relay node.

In practical application, the type determination module 72 isspecifically used to determine the relay node type according toinformation of the available cell of the Un interface, information ofthe available cell of the Uu interface and the software/hardwarecapacity information of the relay node.

According to the practical application scene, the type determinationmodule 72 is specifically used to:

Determine the relay node type as “Requiring resource division” when thesoftware/hardware capacity information of the relay node only supportsresource division;

Determine the relay node type as “Not requiring resource division” whenthe software/hardware capacity information of the relay node onlysupports not requiring resource division;

Determine the relay node type as “Requiring resource division” when thesoftware/hardware capacity information of the relay node supports theboth and both the cells corresponding to information of the availablecell of the Un interface and information of the available cell of the Uuinterface cannot meet the requirement of not requiring resourcedivision;

Determine the relay node type as “Requiring resource division” or “Notrequiring resource division” according to the demand of relay node whenthe software/hardware capacity information of the relay node supportsthe both and a part of the cell corresponding to information of theavailable cell of the Un interface and information of the available cellof the Uu interface can meet the requirement of not requiring resourcedivision;

Determine the relay node type as “Not requiring resource division” whenthe software/hardware capacity information of the relay node supportsthe both and both the cells corresponding to information of theavailable cell of the Un interface and information of the available cellof the Uu interface meet the requirement of not requiring resourcedivision;

In practical application, the information determination module 73 isalso used to determine information of the current cell available forallocation of the Uu interface of the relay node according to the relaynode type determined by the type determination module 72.

It should be further noted that the sending module 74 is specificallyused to:

Report the information of the current cell available for allocation ofthe Un interface to the eNB that the relay node is affiliated to throughthe RRC message, so that the eNB can allocate Un interface resource forthe relay node according to the information of the current cellavailable for allocation of the Un interface and the currenttransmission demand.

Wherein, the sending module 74 is also used to report the relay nodetype to the eNB that the relay node is affiliated to through the RRCmessage. The RRC message can be as the same as or different from the RRCmessage for reporting information of the current cell available forallocation of the Un interface.

On the other hand, embodiments of the present invention provide an eNB.The structural diagram is shown in FIG. 8, which comprises:

Receiving module 81, is used for receiving information of the currentcell available for allocation of Un interface sent by the relay node;

Allocation module 82, is used for allocating Un interface resource forthe relay node according to information of the current cell availablefor allocation of the Un interface received by the receiving module 81.

In specific application scene, the receiving module 81 is also used toreceive information of the current cell available for allocation of theUn interface sent by the relay node through the RRC message.

Compared with available art, the embodiments of the present inventionhave the following advantages:

Upon application of the technical solution for embodiments of thepresent invention, the relay node can determine information of thecurrent cell available for allocation of the Un interface and report theinformation to the eNB, so that the eNB can allocate corresponding Uninterface resource for the relay node, and the eNB can accuratelyacquire resource information of the current cell available forallocation of the Un interface corresponding to the relay node, whichsolves the problem that the relay node cannot work normally undercondition of carrier aggregation caused by mismatching between the Uninterface resource directly allocated by the eNB and the relay node inprior art. With the description of the preferred embodimentshereinabove, those skilled in the art can clearly understand that thepresent invention can be realized with the aid of software and necessarycommonly used hardware platforms, or the aid of hardware of course, butthe former is a preferred embodiment in most cases. Based on thisunderstanding, the technical proposal of the present invention or thepart contributing to the current art can be reflected in the form of asoftware product, which is saved in a memory medium comprisinginstructions to enable a terminal equipment, which could be a personalcomputer, a server or a network device, to carry out the methods foreach embodiment of the present invention.

Technical personnel of the field can understand that the drawings onlyrefer to the diagram of a preferred embodiment, and the module orprocedure is not necessary for the implementation of the embodiments ofthe present invention.

Technical personnel of the field can understand that the module in theunit of an embodiment can be allocated in such unit based on embodimentdescription, or located in one or more units of another embodimentthrough corresponding changes. Modules of the embodiments mentionedabove can be merged into one module, or further divided into a pluralityof submodules.

The number of the aforementioned embodiments of the present invention isonly used for description rather than for representing advantages ordisadvantages.

Only several specific embodiments of the present invention are releasedabove.

However, the present invention is not only comprised of those. Anychange that technical personnel of the field can predict shall beprotected by the present invention.

1. A resource allocation method of relay node under carrier aggregationscene, wherein, which comprises: Relay node acquires information ofavailable cell of Un interface; The relay node determines its relay nodetype according to information of available cell of the Un interface; Therelay node determines information of the current cell available forallocation of Un interface according to the information of availablecell of Un interface and the relay node type; The relay node sends thedetermined information of the current cell available for allocation ofUn interface to an eNB that the relay node is affiliated to, in order tomake the eNB can allocate Un interface resource for the relay nodeaccording to information of the current cell available for allocation ofUn interface.
 2. The method as claimed in claim 1, wherein, the relaynode acquires information of the available cell of the Un interface,which is specifically as: The relay node determines which cellsbelonging to the eNB that the relay node is affiliated to according tothe cell list information downloaded from OAM of the relay node; When acell and the cell that the relay node is accessed to are affiliated tothe same eNB, the relay node determines the cell as the available cellof its Un interface.
 3. The method as claimed in claim 1, wherein, therelay node acquires information of the available cell of the Uninterface, which comprises: The relay node acquires information of theavailable cell of the Uu interface.
 4. The method as claimed in claim 3,wherein, the relay node acquires information of the available cell ofthe Uu interface, which is specifically as: The relay node acquiresinformation of the available cell of its Uu interface according to thecell list information of Uu interface downloaded from the OAM of therelay node.
 5. The method as claimed in claim 3, wherein, the relay nodedetermines its relay node type according to information of availablecell of the Un interface, which is specifically as: The relay nodedetermines its relay node type according to the information of theavailable cell of the Un interface, the information of the availablecell of the Uu interface and its own software/hardware capacityinformation.
 6. The method as claimed in claim 5, wherein, the relaynode determines its relay node type according to information ofavailable cell of the Un interface, which is specifically as: When thesoftware/hardware capacity information of the relay node only supportsresource division, the relay node determines its relay node type as“Requiring resource division”; When the software/hardware capacityinformation of the relay node only supports “Not requiring resourcedivision”, the relay node determines its relay node type as “Notrequiring resource division”. When the software/hardware capacityinformation of the relay node supports the both, and both the cellscorresponding to information of the available cell of the Un interfaceand information of the available cell of the Uu interface cannot meetthe requirement of not requiring resource division, the relay nodedetermines its relay node type as “Requiring resource division”; Whenthe software/hardware capacity information of the relay node supportsthe both, and a part of the cell corresponding to information of theavailable cell of the Un interface and information of the available cellof the Uu interface can meet the requirement of not requiring resourcedivision, the relay node determines its relay node type as “Requiringresource division” or “Not requiring resource division” according to itsdemand; When the software/hardware capacity information of the relaynode supports the both, and both the cells corresponding to informationof the available cell of the Un interface and information of theavailable cell of the Uu interface meet the requirement of not requiringresource division, the relay node determines its relay node type as “Notrequiring resource division”.
 7. The method as claimed in claim 1,wherein, the relay node determines its relay node type according toinformation of the available cell of the Un interface, which alsocomprises: The relay node determines information of the current cellavailable for allocation of its Uu interface according to the relay nodetype.
 8. The method as claimed in claim 1, wherein, the relay node sendsthe determined information of the current cell available for allocationof the Un interface to the eNB that the relay node is affiliated to, inorder to make the eNB can allocate Un interface resource for the relaynode according to information of the current cell available forallocation of Un interface, which is specifically as: The relay nodereports the information of the current cell available for allocation ofthe Un interface to the eNB that the relay node is affiliated to throughthe RRC message; The eNB allocates Un interface resource for the relaynode according to information of the current cell available forallocation of the Un interface and the current traffic transmissiondemand.
 9. The method as claimed in claim 8, wherein, the relay nodereports the information of the current cell available for allocation ofthe Un interface to the eNB that the relay node is affiliated to throughthe RRC message, which also comprises: The relay node reports its relaynode type to the eNB that the relay node is affiliated to through theRRC message.
 10. A relay node, wherein, which comprises: Acquisitionmodule, is used for acquiring information of available cell of Uninterface; Type determination module, is used for determining relay nodetype according to the information of the available cell of Un interfaceacquired by the acquisition module; Information determination module, isused for determining information of the current cell available forallocation of Un interface of the relay node according to theinformation of the available cell of Un interface acquired by theacquisition module and the relay node type determined by the typedetermination module; Sending module, is used for sending theinformation of the current cell available for allocation of the Uninterface determined by the information determination module to the eNBthat the relay node is affilicated to in order to make the eNB canallocate Un interface resource for the relay node according toinformation of the current cell available for allocation of Uninterface.
 11. The relay node as claimed in claim 10, wherein, theacquisition module is specifically used to: Determine which cellsbelonging to the eNB that the relay node is affiliated to, according tothe cell list information downloaded from OAM of the relay node;Determine the cell as the available cell of the Un interface of therelay node when a cell and the cell that the relay node is accessed toare affiliated to the same eNB.
 12. The relay node as claimed in claim10, wherein, the acquisition module is also used to acquire informationof the available cell of the Uu interface of the relay node according tothe cell list information of the Uu interface downloaded from the OAM ofthe relay node.
 13. The relay node as claimed in claim 12, wherein, thetype determination module is specifically used to: Determine the relaynode type according to the information of the available cell of the Uninterface, the information of the available cell of the Uu interface andthe software/hardware capacity information of the relay node.
 14. Therelay node as claimed in claim 13, wherein, the type determinationmodule is specifically used to: Determine the relay node type as“Requiring resource division” when the software/hardware capacityinformation of the relay node only supports resource division; Determinethe relay node type as “Not requiring resource division” when thesoftware/hardware capacity information of the relay node only supports“Not requiring resource division”; Determine the relay node type as“Requiring resource division” when the software/hardware capacityinformation of the relay node supports the both and both the cellscorresponding to information of the available cell of the Un interfaceand information of the available cell of the Uu interface cannot meetthe requirement of not requiring resource division; Determine the relaynode type as “Requiring resource division” or “Not requiring resourcedivision” according to demand of the relay node when thesoftware/hardware capacity information of the relay node supports theboth and a part of the cell corresponding to information of theavailable cell of the Un interface and information of the available cellof the Uu interface can meet the requirement of not requiring resourcedivision; Determine the relay node type as “Not requiring resourcedivision” when the software/hardware capacity information of the relaynode supports the both and both the cells corresponding to informationof the available cell of the Un interface and information of theavailable cell of the Uu interface meet the requirement of not requiringresource division.
 15. The relay node as claimed in claim 10, wherein,the information determination module is also used to determineinformation of the current cell available for allocation of the Uuinterface of the relay node according to the relay node type determinedby the type determination module.
 16. The relay node as claimed in claim10, wherein, the sending module is specifically used to: Report theinformation of the current cell available for allocation of the Uninterface to the eNB that the relay node is affiliated to through theRRC message, so that the eNB can allocate Un interface resource for therelay node according to the information of the current cell availablefor allocation of the Un interface and the current traffic transmissiondemand.
 17. The relay node as claimed in claim 16, wherein, the sendingmodule is also used to: Report the relay node type to the eNB that therelay node is affiliated to through the RRC message.
 18. A resourceallocation method of relay node under carrier aggregation scene,wherein, which comprises: The eNB receives information of the currentcell available for allocation of the Un interface sent by the relaynode; The eNB allocates resource of Un interface for the relay nodeaccording to the information of the current cell available forallocation of the Un interface.
 19. The method as claimed in claim 18,wherein, the eNB receives information of the current cell available forallocation of the Un interface sent by the relay node, which isspecifically as: The eNB receives information of the current cellavailable for allocation of the Un interface sent by the relay nodethrough the RRC message. 20-40. (canceled)